Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Keyboard shortcuts
Mac - Command+Shift+O
Windows/Linux - Alt+Shift+M
This can be changed from Add-on preferences.
Features

• Fast
• Simple
• Customizable UI/shortcuts from preferences

Note - This may not work on addons.mozilla.org

Install

• License: GNU General Public License v3.0 or later
• Weekly downloads: 404
• Average daily users: 26953
• Rating: 4.5/5 of 114 ratings
• Created: 2017-09-06 09:29:16
• Last updated: 2019-07-02 08:05:44
• Homepage: https://github.com/tsl143/measure-it
• Support site and email
• Donate
• Orig: https://addons.mozilla.org/en-US/firefox/addon/measure-it/
• API: {79b2e4de-8fb4-4ccc-b9f6-362ac2fb74b2}